Kappa Pro 18LF-8 18" Professional Series Speaker - Cast

The latest addition to the popular Kappa series of drivers, the Kappa Pro 18LF provides tons of low frequency output in a lightweight, durable cast aluminum chassis. Use it as a subwoofer in small to medium sized boxes, a woofer in large three-way PA enclosures, or as a high-power bass guitar woofer. The 1,600 watt program power rating makes it an easy choice for new box designs or as a replacement for many single and double subwoofer cabinets.

SPECIFICATION
Nominal Basket Diameter	18", 457 mm
Nominal Impedance*	8 Ω
Power Rating*
Program Power	1600 W
Watts	800 W
Resonance	32 Hz
Usable Frequency Range	38 Hz - 0.7 kHz
Sensitivity*	98 dB
Magnet Weight	120 oz.
Gap Height	0.375", 9.5 mm
Voice Coil Diameter	3", 76 mm
THIELE & SMALL PARAMETERS
Resonant Frequency (fs)	32 Hz
DC Resistance (Re)	5.39 Ω
Coil Inductance (Le)	1.21m H
Mechanical Q (Qms)	10.66
Electromagnetic Q (Qes)	0.34
Total Q (Qts)	0.33
Compliance Equivalent Volume (Vas)	391.61 liters / 13.83 cu.ft.
Peak Diaphragm Displacement Volume (Vd)	927.2 cc
Mechanical Compliance of Suspension (Cms)	0.21 mm/N
BL Product (BL)	19.39 T-M
Diaphragm Mass Inc. Airload (MMs)	119 grams
Efficiency Bandwidth Product (EBP)	94
Maximum Linear Excursion (Xmax)	8 mm
Surface Area of Cone (Sd)	1159 cm2
Maximum Mechanical Limit (Xlim)	18 mm
MOUNTING INFORMATION
Recommended Enclosure Volume
Sealed	0-0 liters / 0-0 cu.ft.
Vented	113.27-353.96 liters / 4-12.5 cu.ft.
Driver Volume Displaced	0.234 cu.ft. / 6.62 liters
Overall Diameter	18", 457.2 mm
Baffle Hole Diameter	16.58", 421.1 mm
Front Sealing Gasket	Yes
Rear Sealing Gasket	Yes
Mounting Holes Diameter	0.28", 7.1mm
Mounting Holes B.C.D.	17.25", 438.2mm
Depth	8.15", 207 mm
Net Weight	24.5 lbs, 11.11 kg
Shipping Weight	26.5 lbs, 12.02 kgs
MATERIALS OF CONSTRUCTION
Coil Construction	Copper voice coil
Coil Former	Kapton former
Magnet Composition	Ferrite magnet
Core Details	Vented and extended core

Basket Materials	Die-cast aluminum basket
Cone Composition	Treated paper cone
Cone Edge Composition	Cloth cone edge
Dust Cap Composition	Treated paper dust cap